mos, watched. Many scientists and support personnel, including Maj. Gen. Lesli

1. e Groves, head of the Manhat
   tan Projec   
   
   
2. t, watched the explosion from base camp which was ten m
3. iles southwest of ground zero. All the buildings at base camp were
4. removed after the test. Most visiting VIPs, like Edward Teller,
   watched from Compania Hill, 20 miles northwest of
5. ground zero. The test was scheduled for 4 a.m. July 16, but rain and lightning early that morning cau
6. sed it to be postponed. The device could not be exploded under rainy c

onditions because rain and winds would increase the danger from radioactive fallout and i

nterfere with observation of the test. At 4:45 a.m. the crucial weather report